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总結了渣鉄間碳还原反应,包括FeO,MnO,CrO,V_2O_3的还原和铁液中脫硫。可以认为界面上化学反应很快达到平衡,而整个反应的控制步驟是对流扩散。发現反应級数,在熔体处于旋轉运动(用旋轉坩堝或旋轉攪拌棒)下为一級,处于仅由CO气泡攪动(用靜止坩堝)下为二級;处理脫硫和FeO的还原数据的結果表明,在上述两种情况下,扩散界面层厚度δ分别和轉速ω~(-1/2)和浓度C~(-1)成比例。討論了固液界面上对流扩散原理在渣铁间碳还原反应中的应用,可以滿意地說明上述規律性。对于SiO_2的碳还原反应,根据現有实驗結果,尚不能肯定对流扩散的作用,可能此反应受界面化学反应所控制。
The carbon reduction reaction between slag 鉄 was summarized, including the reduction of FeO, MnO, CrO and V_2O_3 and the desulfurization in molten iron. It is considered that the chemical reaction at the interface quickly reaches a balance, and the control step of the entire reaction is convection diffusion. The reaction order was found to be one level below the melt in rotational motion (with a rotating crucible or rotating stir bar), two levels below the mere crumb with CO bubbles alone, and the reduction of desulfurization and FeO The results show that in the above two cases, the thickness δ of diffusion interface is proportional to the rotational speed ω ~ (-1/2) and the concentration C -1, respectively. The application of the convection diffusion principle at the solid-liquid interface to the carbon-reduction reaction between slag and iron is discussed. The above regularity can be satisfactorily described. For the carbon reduction reaction of SiO_2, according to the existing experimental results, the effect of convection and diffusion can not be affirmed. The reaction may be controlled by the interface chemical reaction.